This applies to version 6.1.5, released 12/27/13. After updating, TB will force-close whenever an app is selected from the backup/restore list. This seems to be happening for most if not all people who have updated to this version, as seen by the large number of reviews reporting the issue. For those who update manually, do NOT take this update. Wait until a fix is released and confirmed to work. If you've already updated and are having this problem, there is a link to an older version on the developer's website. Download and install that version for a temporary fix until the next update.